Improvement in ventilating railroad-cars



.ing is a full and e.\ ;act description thereof', ref- .suitahle bearings attached UNITED STATES VPATerrr OFFICE.

CHARLES Dass GIBSON, on New YORK, N. y.

IMPROVEMENT iN- VENTILATING aAiLacAocARs.

Specicatiou forming part of Letters Pai/ent No. 39,140, dated July 7, 1563.

.To all whom, it mayconcern.-

Be itknown that l, CHARLES DANA GmsoN, of New York, in the county and State -of New York, have invented a new and useful lmprovement in the Mode of Ventilating Cars; and I do her'el` det-lare that'the followexence being had to the accompanying drawings, and to the letters of reference marked thereon. t v Figure I represents a side view of a loco motivet'ender with 1n y improved arrangement shown i-n dotted lines. Y Fig. II shows acrosssectiou of thesame at the line IIIAIV.

Similar letters represent similar parts.

The nature of my invention consists in the arrangement of a right. and of a left handed screw uponthe s ame shaft, situated in the afterpartof the water-tank of a locomotive'- tender above the levell of the water, and so arranged thatl the air will be drawn in at: the sides of t-lxe tender and expelled at tlie top, near the, center, throngh'a pipe which com ducts the air to the diti'erent': ears.

. In the accompanying drawings, A repre seats-u locomotive tender constructed 1n the i usual manner. In the after part ofthe water-V tank B'ashaft, C, is situatethrnnung in vto 'the side ot" the tender, and provided with' small which pa'ssover pulleys m m,i`ast to the after wheeiaxlc' I),-an d through which motion is'l communicated to the shaft Cv'This shaft!) is provided atone side of thecenter with -a right-handed screw, N, and at' 'the other side and from there into i train.

pulleys n n f of the on ,the ends, over which hands. p p pass,

' .of its-,center with 4a-'lettfhanded screw, M.

On the top ofthe water tank, near the center, a pipe, I,"is attached, which is. connected, through an` suitable coupling, mated-on the top of the cars, and arrangtd with suitable outlets for the air into said cars, llhe shaft; C, with its screw-wheels N and M, is situated in the `top part of the water-tank B, above the level ot' the water. ters-through the sides of the tender through suitable openings, .-r, near'the shaft-bearings, 'where the air is `s`till pure, and only little mixed with dust occasioned by the velocity of the train and is -still further purified and cooled while passingr overthe surface of the water jin the tank. By the actionot the right and left handed screw-wheels 1N' and M the airjsforced toward the center into the upright pipe l on the top ot' the water-tank B,

the several cars ofthe What I claim as in v invention, and desire to secure by Letters Patent, is-

The arrangement.' of-a shaft, C, provided with right and lei't' handed screw-wheelsN and M in the water-tank of a locomotive-tend-- er, `above the level of the water, in combination'with suitable openings in the side-s ofthe tender, and with an escapepipe, P, on the top tender, and operated in the manner and for the purpose-as described and set forth.

oH'ARLnspDA-*s'a GIBSON.

' Witnesses:

, T. Broun. VosE, HENRY E. Bomann. v 

